Mast Text in Android without losing any char inputed

MasksEnum.kt

enum class StringMasks(val mask: String) {
    CPF("###.###.###-##"),
    PHONE("(##) #####-####"),
    SMALL_DATE("##/##"),
    CARD_NUMBER("#### #### #### ####")
}

MaskTextWatcher.kt

class MaskTextWatcher(private val mask: String) : TextWatcher {
    private var isRunning = false
    private var isDeleting = false

    override fun beforeTextChanged(charSequence: CharSequence, start: Int, count: Int, after: Int) {
        isDeleting = count > after
    }

    override fun onTextChanged(charSequence: CharSequence, start: Int, before: Int, count: Int) {}

    override fun afterTextChanged(editable: Editable) {
        if (isRunning || isDeleting) {
            return
        }

        isRunning = true

        var index = 0
	for (m in editable.toString().trim().unmask().applyMask(mask).toCharArray()) {
            try {
		if (editable[index] != m) {
			editable.insert(index, m.toString())
                }
            } catch (e: Exception) {
                break
            }
            index++
        }

        isRunning = false
    }
}

UnmaskString.kt

fun String.unmask(): String {
    return replace("[.]".toRegex(), "").replace("[-]".toRegex(), "").replace("[/]".toRegex(), "")
        .replace("[(]".toRegex(), "").replace("[ ]".toRegex(), "").replace("[:]".toRegex(), "")
        .replace("[)]".toRegex(), "")
}